Levy

Harriet Levy appeals from a judgment denying a writ to compel respondent San Francisco Unified School District to recognize appellant as a permanent employee and pay her for such service.

Appellant was first employed by respondent district in the fall of 1969 as a day-to-day substitute, filling in for teachers at several schools in the district. Effective February 16, 1970, through June 30, 1970, appellant was assigned as a long-term substitute in place of Michael Lyons. Lyons held both a general secondary and a pupil services credential and had been .designated as acting dean of boys at Woodrow Wilson High School. Appellant taught subjects (mathematics and girls’ physical education) which Lyons, under his general secondary credential, was qualified to teach. This assignment of appellant expired at the close of the school year on June 30, 1970.

In the fall of 1971, appellant again served as a day-to-day substitute in various teaching assignments. In the spring semester of 1972, appellant served as a long-term substitute, teaching classes which had been taught by Adolphus Bush, who had been assigned to another teaching position *955 in the same school. But the trial…